How can tartar and plaque be removed from teeth without grinding? is there any paste, etc. for it?
The girders of a suspension bridge form an arc. The definition of an arc is a curve or bowed shape, like a part of a circle. An example of an arc is a rainbow. To arc is defined as to make a curved shape or move in a curved path.
Mathematics. 1  Arc (geometry), a segment of a differentiable curve. 2  Arc (projective geometry), a particular type of set of points of a projective plane. 3  Arcminute, a measure used for angles, equal to 1â60 of a degree. 4  arc (function prefix) (arcus), a prefix for inverse trigonometric functions. 5  A directed edge in graph theory.